Pipe joint



June 7, 1955 w w WELTMER Re. 24,019

PIPE JINT Original Filed Jan. l0, 1950 United States Patent Oiice Re.24,0l9 Reissue-tl .inne 2, 1955 PIPE JOINT Wilt'on W. Weltmcr,lllilwaukee, Wis., assignor to Allis- Chalmers lvianufaeturing Company,Milwaukee, Wis., a corporation of Delaware rgiual No. 2,583,401, datedJanuary 22, 1952, Serial No. 137,680, January 10, 1950. Application forreissue August 23, 1952, Serial No. 306,076

Claims. (Cl. 285-211) Matter enclosed in heavy brackets [I] appears inthe original patent but forms no part of this reissue specification;matter printed in italics indicates the additions made by reissue.

This invention relates to pipe joints and more particularly to dischargeelbows of the type used on deep well pumps; and the principal object ofthe invention is to provide a .new and improved pipe joint for joiningtogether in angular relationship two or more pieces of pipe.

A specific use for my new and improved pipe joint is shown, merely byway of example, as a 9() degree discharge elbow for a deep well pump. Itis to be understood, however, that although the invention will be hereinescribed with reference to an elbow, for clearness of understanding, theconstruction is also applicable to Ts, crosses and the like and is to beso interpreted in the claims. Thus, the word elbow as used hereincomprehends broadly a joint between two or more pieces of pipe.

An object of this invention is to provide a new and improved fabricatedpipe joint or elbow having a generally convex inner corner.

Another object of this invention is to provide a pipe joint or elbowhaving parts which may be fabricated simply and easily, the nature ofsuch parts being such that they may be assembled and connected either inthe shop or the iield.

Another object of the invention is to provide a pipe joint or elbowhaving a generally convex inner corner, the component parts of which maybe formed out of pipe and flat plate by simple cutting operations.

Another object of the invention is to provide a fabricated pipe joint orelbow, with a generally convex inner corner, which is applicable toelbows which bend more or less than 90 degrees as well as to 90 degreeelbows.

The novel features of the invention and how the objects are attainedwill appear more fully from this specilication and the accompanyingdrawing showing one embodiment of the invention and forming a part ofthis application, and all these novel features are intended to bepointed out in the claims.

ln the drawing:

Fig. l is a sectional elevation of the upper end of a deep well pumpembodying a discharge elbow made in accordance with my invention;

Fig. 2 is a similar to Fig. 1 and shows a side elevation of the elbowshown in Fig. l;

Figs. 3 and 4 are side and end views, respectively, of a component partof the elbow shown in Fig. 2;

Figs. 5 and 6 are side and end views, respectively, of a component partof the elbow shown in Fig. 2;

Figs. 7 and 8 are side and end views, respectively, of a component partof the elbow shown in Fig. 2;

Fig. 9 is a layout showing the angular' relationship between the partsof a three gore, 90 degree elbow; and

Fig. l0 is a layout showing the angular relationship between the partsof a two gore, 120 degree elbow.

Figs. 1 and 2 show, by way of example, the upper part of a deep wellpump embodying a fabricated 90 degree pipe joint or discharge elbow 10made in accordance with my invention.

A motor support 11, having a llange 12, to which a driving motor (notshown) may be bolted, is mounted on top of the elbow 16. Within thesupport 11 and also mounted on top of the elbow 1d is a bearing andstuiiing box assembly 13 adapted to receive a driving shaft 14 which iscoaxial with the vertical leg portion of the elbow 10.

The assembly 13 is threaded to receive a shaft tube 1S which enclosesthe shaft 14 and protects it from the material being pumped. The tube 15is optional and may be omitted in some installations.

The elbow 16 has mounted thereon a bottom flange 16 for bolting to aflanged column pipe (not shown) and a side Flange 17 for connecting to aflanged discharge line (not shown).

rIhe above is a description of the various typical parts which may beassociated with my new and improved pipe joint in a particularembodiment, in this case characterized by a discharge elbow for a deepwell pump. A description of the pipe joint itself and the method ofmaking follows.

Figs. l and 2 show an assembled 90 degree pipe joint or elbow l0 andFigs. 3 to S show the various parts therefor.

In the elbow 10 shown in Figs. l and 2 are two pipe elements 2b, shownin detail in Figs. 3 and 4, each having an extended portion 2i ofsemicircular sec-tion and a nonextended portion 22. As this is a degreeelbow, in this instance, the pipe elements 20 are arranged with theiraxes 23 intersecting so as to form a 90 degree angle and the extendedportions 21 abut in a plane disposed at an angle or 45 degrees to eachof the axes 23 forming an outer corner of the elbow. If desired theouter corner may be rounded in any known manner.

Semielliptical edge 24 on each of the pipe elements 2() has a certainshape determined by the angle the plane, in which the edge is disposed,makes with the axis 23.

A generally convex inner corner is formed by arranging two gores 25,shown in detail in Figs. 5 and 6, between and in abutting relation withthe semielliptic edges 24, on the pipe elements 20. Each of the gores 25is of semicircular section, has the same radius as the pipe elements 20,and has a predetermined subtended angle relative to the angle which theplane containing the semielliptic edges 2li makes with the respectiveaxes 23'. The relationship of these angles will be explainedhereinafter.

The axial edges 26 of the pipe elements 20 and the axial edges 27 of thegores 25 are, respectively, on both sides of the elbow 10, located insingle planes. Two at members 30, shown in detail in Figs. 7 and 8,conforming, respectively, to 'the size and shape of the respectivespaces bonded by the axial edges 26 and 27 are disposed, respectively,in said spaces in abutting relation with said axial edges.

All of the above mentioned abutting edges are joined as by welding.

An important feature of the herein described elbow is that that therespective parts thereof may be readily formed out of pipe and ilatplate by simple cutting operations. The parts formed according to myinvention fit together accurately upon assemblying and thus avoidexpensive manufacturing operations such as bending, ilaring and thelike.

Fig. 2 also illustrates the angular relationships between the pipeelements 10 and the gores 2S. Figs. 9 and l() illustrate theapplicablility of the invention to elbows which bend more or less than90 degrees and to the use of any number of gores 25a and 25h,respectively, depending on the degree of curvature desired on the innercorner.

Parts, other than the gores 25a and 26h, corresponding N-I-l Althoughconvenient it is not essential that the axial lengths of the gores 25 bethe same. The angle the respective planes containing the semiellipticaledges 24 make with the axes 23 is 180- A o Q-. 90 2 N+ 1) Fig. 9illustrates a 90 degree elbow (A=90) with three gores 25a (N23). In thisinstance the subtcndcd angle of each of the gores 25a is 180 -A N -l- 1The angle the respectiveplanes containing the semielv liptical edges 24make with the axes 23 is Fig. l() illustrates a l2() degree elbow(A:l20) with two gores 25h (N=2). ln this instance the subtended angleof each of the gores 25h is The angle the respective planes containingthe semielliptical edges 24 make with the axes 23 is Frein the foregoingit will be apparent to those skilled in the art that the illustratedembodiments of the invention provide a new and improved pipe joint andthe method of making same, and accordingly accomplishes the objects ofthe invention. On the other hand, it will also be obvious to thoseskilled in the art that the illustrated embodiments of the invention maybe variously changed and modiiied or features thereof singly orcollectively, embodied in other combinations than those illustratedwithout departing from the spirit of the invention and accordingly thedisclosure herein is illustrative only, and the invention is not limitedthereto.

It is claimed and desired to secure by Letters Patent:

l. An elbow or the like for connecting lengths of pipe, in combination:pipe elements with extended portions of semicircular section arranged sothat their axes intersect, a generally convex inner corner formed by aplurality of abutting gores of semicircular section, each gore havingthe same radius as said pipe elements; a semielliptical edge on thenonextended portion of each of said pipe elements; the gore at each endof said plurality of gores abutting respectively said semiellipticaledge on each pipe element; iiat members conforming respectively to thesize and shape ot the respective spaces bounded by the axially extendingedges of said pipe elements and said gores, said flat members disposedrespectively in said spaces in abutting relation with said axiallyextending edges; and all of said abutting edges are joined as bywelding.

2. An elbow or the like for connecting lengths of pipe comprising, incombination: pipe elements with extended portions of semicircularsection arranged with their axes intersecting; a generally convex innercorner formed by a plurality of abutting symmetrical gores ofsemicircular section, each of said gores having the same radius or 78%cas said pipe elements and each of said gores having semielliptical edgesidentical with such edges on the other gores; a semielliptical edge onthe nonextended portion of each of said pipe elements identical withsuch edges on said gores; the gore at each end of said plurality ofgores abutting respectively said semielliptical edge on each pipeelement; flat members conforming respectively to the size and shape ofthe respective spaces bounded by the axially extending edges of saidpipe elements and said gores, said dat members disposed respectively insaid spaces in abutting relation with said axially extending edges; andall of said abutting edges are joined as by welding.

3. An elbow or `the like for connecting lengths of pipe comprising, incombination: two pipe elements with extended portions ot' semicircularsection, said extended portions abutting in a plane disposed at an angleof 45 degrees to the axis of each pipe element and forming an outercorner of said elbow; a generally convex inner corner formed by twogores of semicircular section in abutting relation to each other, eachgore having the same radius as said pipe elements and a subtended angleof 30 degrees; a semielliptical edge on the nonextended portion of eachof said pipe elements in planes disposed respectively at an angle ofdegrees to the axis of each pipe element; each of said gores abuttingrespectively said semielliptical edge on each pipe element; two latmembers conforming respectively to the size and shape of the respectivespaces bounded by the axially extending edges of said pipe elements andsaid gores, said flat members disposed respectively in said spaces inabutting relation with said axially extending edges; and all of saidabutting edges are joined as by Welding.

4. An elbow for connecting lengths of pipe comprising, in combination:two equal radii pipe elements each having o nonextended portion with asemielliptical edge and an extended portion of semicircular section witha semielliptical edge, said semielliptical edges of said nonextendedportions being identical and said semiellptical edges of said extendedportions being identical and aligned` in abutting relation; a generallyconvex inner corner formed by gore means positioned between and inabutting relation to the semielliptical edges on said nonextendedportions and comprising at least one gore, each gore having the sameradius as said pipe elements and being of semicircular cross section andeach gore being symmetrical with semiellipical edges identical to thesemielliptical edges on said nonextended portions of said pipe elements;two flat members conforming respectively to the size and shape of tworespective spaces bounded by axially extending edges of said pipeelements and said gore means, said flat members being disposedrespectively in `said spaces in abutting relation with the axiallyextending edges; and all of scid abutting edges are joined as bywelding.

5. An elbow for connecting lengths of pipe comprising, in combination:two equal radii pipe elements with extended portions of semicircularsection, said extended portions abutting in a plane disposed at an angleof 45 degrees to the axis of each of the pipe elements to form the outercorner of the elbow; a nonextended portion on each of said pipe elementshaving a semielliptical edge, said scmielliptical edges of saidnonextended portions being identical; a generally convex inner cornerformed by gore means positioned between and in abutting relation to thesenzielliprical edges on said nonexzended portions and comprising atleast one gore, each gore having the same radius as said pipe elementsand being of semicircular cross section and each gore being symmetricalwith semielliptical edges identical to the semiclliptical edges on saidnoncxiended portions of said pipe elements; two flat members conformingrespectively to the size and shape of two respective spaces bounded byaxially extending edges of said pipe elements and said gore means, saidflat members being disposed respectively in said spaces in abuttingrelation with the axially extending edges; and all of said v FOREIGNPATENTS abutting edges are joined as by welding. 184,082 Great BritainAug 10 1922 References Cited iri he le of this patent OTHER REFERENCESor the orlgmal patent 5 Sheetmetal handbook (1928), by William Neubecker(pp. 54 and 55), The Sheet Metal Publication Co., Trib- UNITED STATESPATENTS une Bldg., 154 Nassau St., New York, N. Y., Library of 2,003,538Hlckey June 4, 1935 Div 14 2,147,431 Ewing Feb. 14, 1939 2,189,201Flader Feb. 6, 1940 10 2,330,074 Morris et al. Sept. 21, 1943 2,334,424Singleton Mal'. 14, 1944

